Oil-burner system



Jan; 11, 1927.

, H. SWARTZ ET AL OIL BURNER SYSTEM Filed July 17, 1926 INVE 1 NTOR PAUL c. MULL/G/IN HUGH .SWfl/iTZ mm ATTORNEY Pu nam... 1i; i927.

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. 13 on the outer end. of t OIL-BURNER SYSTEM.

Application filed July" 17,

Our invention relates to improvements in oil burning-systems and the objects of our invention are to provide an oil burning system'that is highly efficient in operation and that is comparatively cheap and simple to install. Y i

"Another object is to provide an oil burning system in whicha singleair pump is made. to perform the'double function of lifting-the oil by suction from an underground stora e tank to a vacuum tank and of drawing t e oil by suction from the vacuum tank to a discharge nozzle, the discharge nozzle being at a higher elevation than the oil level in the vacuum tank.

A further-object is to provide an oil burning system which has an oil conduit between the vacuum tank and the air ump so that a small ortion of the fuel oi will be constantly rawn. through the pump,- keeping the pump thoroughly lubricated at all times.

Further obje'cts'residein the provision of novel spray nozzle and ignition means.

Other and more 8 ecific objects will be'apparent from the fol owing description taken n connection with the accompanying drawlngs. i

In the drawings, Figure 1 is a somewhat diagrammatic view partly in section and partly in side elevation of an oil burning system constructed in accordance with our invention. v Figs. 2, 3 and 4 are detached sectional views on a v arger scale of a vacuum tank, a fuel discharge nozzle and a spark plug used for ignition urposes respectively.

Referring tov e drawings, throughoutwhich like reference numerals designate like parts, 5 desi ates any furnace or similar device which is to be heated and 6 designatesa combustion tube that is inserted through the side of the furnace. A fuel discharge nozzleembodying an outer nozzle member 7 and an axially disposed inner 1n ector memher 8 is screwed into the end of the combustion' tube 6 as shown in Fig. 3. The outer nozzle member {7 has 'an' internal recess 10 of larger diameter than the exterior of the injector. member 8' and said nozzle member 7 19 provided with a discharge orifice 11. ,A fuel inlet pipe '12 istapped through a head e nozzle member 7 and communicates with the internal passageway 10 surrounding the injector member 8.

p A pipe 18 for the inlet of air under pressure let passageways 17 in the upper 1926., Serial in. 128,170.

ignited by a spark plug-15 that is threaded through one side of the combustion tube 6 and has terminals'16 positioned so as to produce a spark or sparks in the ath of dis,-

charge of the fuel directly in ront of the Fuel discharging fromthe nozzle 7 may be l"" nozzle 7. To prevent carbonizing of the spark plug terminals 16 we provide air inortion of the spark plug and further provide one or more air inlet openings 18 in the wall of the combustion tube 7, all ofsaid air inlet'open- -ings being arranged to have cold air drawn in therethrough over, the terminals 16thus preventing the formation of carbon on said terminals. Any suitablemanually or auto matically operated means may be provided 1 nected with the bottom end of a vacuum tank 22. The air inlet port of the rotary pump 20 is connected'by a pipe 23 with the 'fog controlling the discharge of sparks from said spark plug. The tube 6 together with upper end of the vacuum tank 22v and said pipe 23 is further providedwith valve controlled means indicated at 24: that o ens'to the atmosphere so that air may be at mitted to the pump 20 and at the same time a vacuum maintained in the upper portion of the vacuum tank 22. An oilconduit pipe 25 for lubricating oil is connected with the air inlet pipe 23 and with the bottom 'of the vacuum tank 22 to supply oil for lubricating the pump 20. A valve 26 is provided in the plpe 25 to control the amount of oil for lubricating purposes thatis allowed to pass to the pump 20. V

The pump 20 maybe driven by'a motor 27. The vacuum tank struction having an upper compartment 28 connected by a tube 29 with a lower'comlpartment 30. A check valve'31 is provided in connection with tube 29. Avent pipe 32 connects lower compartment 30 with the atmosphere. A float 33 is provided "in the 22 is of standard'co -f lib upper compartment and is adapted to open and close a valve 3t within a passage- "way that communicates with the outside atmosphere. The upper compartment 28 is connected by a ipe 36 with a fuel storage tank 37 usually ocated underground and at some distance from the vacuum tank. A vent 38 is ordinarily provided for the fuel storage tank 37.

The vacuum tank 22 is positioned so that the maximum level of the fuel therein as indicated at is below the horizontal plane of the burner nozzle 7.- This absolutely prevents a gravity flow of fuel from the vacuum tank out of the burner nozzle under any conditions.

I In the operation of this oil burner system the motor 27 driving the pump 20 discharges air through the pipe 13 and nozzle tube 8 as shown in Fig. 3 and at the same time induces a vacuum or suction in the upper vac-.

uum tank compartment 28. This suction closes the check valve 31, and, if valve 34 is closed, draws fuel from the storage pipe 36.

As soon as the fuel level in the compartment 28 raises the float 33 high enough to open the valve 3% the suction in the compartment 28 is relieved, the check valve 31 is allowed to open and fuel flows down through the tube 29 into the lower vacuum tank compartment 30. en the float 33 has been lowered suficiently it again closes thevalve 34 and more fuel is drawn into the upper compartment. By operating in the manner common to vacuum tanks of this nature the fuel level in said vacuum tank is automatically maintained between two deter 'mined by the upper and lower limits of the float 33 in opening and closing the valve 34.

The discharge of air through the injector tube 8 produces a suction in the fuel inlet pipe 12 suflicient to draw-oil or similar liquid fuel from the tank 22 into the chamber 10 of the fuel nozzle, from .which said oil is drawn outwardly (past the end of the injector pipe 8 and ischarged in afinely divided spray along with the air from the dis- 1 charge orifice 11.

'l formation of carbon on the spark plug terniinals, on the end of the nozzle and within the adjacent parts 'of the combustion tube 6..

. Combustion begins within the combustion tube 6 but occurs chiefly beyond the end of The cold air drawn in said tube and in the combustion chamber of the furnace.

The relative amounts of oil and air that are delivered through the nozzle may be regulated by adjustment of the valve 21.

When the motor is stopped suction on pipe 21 will cease, and, consequently, the flow of fuel will cease, the nozzle 7 being slightly above the plane of the fuel level 40 in the vacuum tank making it impossible to flood the furnace by a gravity flow of oil in case .of accidental stopping of the mechanism.

vacuum tank.

' Another important feature of the invention is in the provision of the control means that enables a limited amount of suction to be maintained upon the intake manifold and at the same time permitting sufficient air to provide a pressure for operating the oil burnerspray nozzle.

The following description and accompanying drawings clearly disclose a preferred embodiment of our invention, but it will be understood that this disclosure is merely illustrative and that such changes in the apparatus may be made as are within the scope and spirit of the following claim.

What we claim is:

In oil burning apparatus of the classdescribed, an injector type burner head, a vacuum tank having a vacuum chamber and an oil storage chamber, an air pump, means for driving said air pump, a conduit connecting said burner head with the air discharge port of said pump, another conduit connecting said burner head with the oil storage chamber of said vacuum tank, another conduit connecting said vacuum chamber with the suction inlet of said pump, another conduit connecting the suction inlet of said pump with said oil storage chamber for supplying oil for lubricating purposes to said pump, an oil storage tank and a conduit pipe con necting said vacuum chamber and said oil storage tank.

In witness whereof, we hereunto subscribe our names this 12th day of July, A. D. 1926.

HUGH SWARTZ. PAUL C. MULLIGAN. 

